We have an old home built in 1924. While it is well-built, it was prone to wet windows, mouldy curtains and cold chill during the winter months. In the summer, the warm air stagnated and it was difficult to sleep at night. We had an HRV system installed in 2009 and during the winter our house became instantly drier, cleaner, warmer and healthier, while in the summer, the air became cool and dry at night. With the addition of floor and roof insulation as well as our HRV the house is less expensive to heat and a healthier place to live.